2012-03-27 21:40:49 +02:00
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/****************************************************************************
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* nuttx/graphics/nxconsole/nxcon_scroll.c
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*
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2014-07-17 20:58:04 +02:00
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* Copyright (C) 2012, 2014 Gregory Nutt. All rights reserved.
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2012-03-27 21:40:49 +02:00
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <semaphore.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/nx/nx.h>
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#include <nuttx/nx/nxfonts.h>
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#include "nxcon_internal.h"
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxcon_movedisplay
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*
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* Description:
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* This function implements the data movement for the scroll operation. If
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* we can read the displays framebuffer memory, then the job is pretty
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* easy. However, many displays (such as SPI-based LCDs) are often read-
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* only.
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****************************************************************************/
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2012-05-07 23:25:24 +02:00
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#ifdef CONFIG_NX_WRITEONLY
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2012-03-27 21:40:49 +02:00
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static inline void nxcon_movedisplay(FAR struct nxcon_state_s *priv,
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int bottom, int scrollheight)
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{
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FAR struct nxcon_bitmap_s *bm;
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struct nxgl_rect_s rect;
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nxgl_coord_t row;
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int ret;
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int i;
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/* Move each row, one at a time. They could all be moved at once (by calling
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* nxcon_redraw), but the since the region is cleared, then re-written, the
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* effect would not be good. Below the region is also cleared and re-written,
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* however, in much smaller chunks.
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*/
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rect.pt1.x = 0;
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rect.pt2.x = priv->wndo.wsize.w - 1;
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for (row = CONFIG_NXCONSOLE_LINESEPARATION; row < bottom; row += scrollheight)
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{
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/* Create a bounding box the size of one row of characters */
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rect.pt1.y = row;
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rect.pt2.y = row + scrollheight - 1;
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/* Clear the region */
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ret = priv->ops->fill(priv, &rect, priv->wndo.wcolor);
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if (ret < 0)
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{
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2014-07-17 20:58:04 +02:00
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gdbg("Fill failed: %d\n", errno);
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2012-03-27 21:40:49 +02:00
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}
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/* Fill each character that might lie within in the bounding box */
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for (i = 0; i < priv->nchars; i++)
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{
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bm = &priv->bm[i];
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if (bm->pos.y <= rect.pt2.y && bm->pos.y + priv->fheight >= rect.pt1.y)
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{
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nxcon_fillchar(priv, &rect, bm);
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}
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}
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}
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2014-07-17 20:58:04 +02:00
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/* Finally, clear the vacated part of the display */
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2012-03-27 21:40:49 +02:00
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rect.pt1.y = bottom;
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rect.pt2.y = priv->wndo.wsize.h- 1;
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ret = priv->ops->fill(priv, &rect, priv->wndo.wcolor);
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if (ret < 0)
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{
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gdbg("Fill failed: %d\n", errno);
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2012-03-27 21:40:49 +02:00
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}
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}
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#else
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static inline void nxcon_movedisplay(FAR struct nxcon_state_s *priv,
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int bottom, int scrollheight)
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{
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struct nxgl_rect_s rect;
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struct nxgl_point_s offset;
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int ret;
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2014-07-17 20:58:04 +02:00
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/* Add the line separation value to the scroll height */
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scrollheight += CONFIG_NXCONSOLE_LINESEPARATION;
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2012-03-27 21:40:49 +02:00
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/* Move the display in the range of 0-height up one scrollheight. The
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* line at the bottom will be reset to the background color automatically.
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*
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* The source rectangle to be moved.
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*/
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rect.pt1.x = 0;
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2014-07-17 20:58:04 +02:00
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rect.pt1.y = scrollheight;
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2012-03-27 21:40:49 +02:00
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rect.pt2.x = priv->wndo.wsize.w - 1;
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rect.pt2.y = priv->wndo.wsize.h - 1;
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/* The offset that determines how far to move the source rectangle */
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offset.x = 0;
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offset.y = -scrollheight;
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2014-07-17 20:58:04 +02:00
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/* Move the source rectangle upward by the scrollheight */
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2012-03-27 21:40:49 +02:00
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2012-03-31 00:49:08 +02:00
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ret = priv->ops->move(priv, &rect, &offset);
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2012-03-27 21:40:49 +02:00
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if (ret < 0)
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{
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gdbg("Move failed: %d\n", errno);
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}
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/* Finally, clear the vacated bottom part of the display */
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rect.pt1.y = priv->wndo.wsize.h - scrollheight;
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ret = priv->ops->fill(priv, &rect, priv->wndo.wcolor);
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if (ret < 0)
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{
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gdbg("Fill failed: %d\n", errno);
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2012-03-27 21:40:49 +02:00
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}
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}
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxcon_scroll
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****************************************************************************/
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void nxcon_scroll(FAR struct nxcon_state_s *priv, int scrollheight)
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{
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int i;
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int j;
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/* Adjust the vertical position of each character */
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for (i = 0; i < priv->nchars; )
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{
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FAR struct nxcon_bitmap_s *bm = &priv->bm[i];
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/* Has any part of this character scrolled off the screen? */
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if (bm->pos.y < scrollheight + CONFIG_NXCONSOLE_LINESEPARATION)
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{
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/* Yes... Delete the character by moving all of the data */
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for (j = i; j < priv->nchars-1; j++)
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{
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memcpy(&priv->bm[j], &priv->bm[j+1], sizeof(struct nxcon_bitmap_s));
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}
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/* Decrement the number of cached characters ('i' is not incremented
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* in this case because it already points to the next character)
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*/
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priv->nchars--;
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}
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/* No.. just decrement its vertical position (moving it "up" the
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* display by one line).
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*/
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else
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{
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bm->pos.y -= scrollheight;
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/* We are keeping this one so increment to the next character */
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2014-04-14 00:22:22 +02:00
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2012-03-27 21:40:49 +02:00
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i++;
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}
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}
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/* And move the next display position up by one line as well */
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priv->fpos.y -= scrollheight;
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/* Move the display in the range of 0-height up one scrollheight. */
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nxcon_movedisplay(priv, priv->fpos.y, scrollheight);
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2012-03-30 00:20:47 +02:00
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}
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